Economics Introduction Written Answer pls help A busy small business owner is considering purchasing groceries through a premium home delivery service because of its convenience. The service provides the best groceries and costs significantly more than buying groceries in the store, but home delivery is an attractive feature. Examine the opportunity costs and trade-offs of the small business owner choosing to buy groceries through this premium home delivery service. Compare your findings with the opportunity costs and trade-offs if the small business owner were to choose buying groceries in the store instead.(4 points)

Reliability and validity reliability and validity are two important considerations that must be made with any type of data collection. reliability refers to the ability to consistently produce a given result. in the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways. unfortunately, being consistent in measurement does not necessarily mean that you have measured something correctly. to illustrate this concept, consider a kitchen scale that would be used to measure the weight of cereal that you eat in the morning. if the scale is not properly calibrated, it may consistently under- or overestimate the amount of cereal that’s being measured. while the scale is highly reliable in producing consistent results (e.g., the same amount of cereal poured onto the scale produces the same reading each time), those results are incorrect. this is where validity comes into play. validity refers to the extent to which a given instrument or tool accurately measures what it’s supposed to measure. while any valid measure is by necessity reliable, the reverse is not necessarily true. researchers strive to use instruments that are both highly reliable and valid.

In 1975, mcdonald’s introduced its egg mcmuffin breakfast sandwich, which remains popular and profitable today. this longevity illustrates the idea of:

Which of the following statements is true about an atm card?